You create an executable script that continually retries a failed network or database connection, but it only runs once and exits. In other cases, the condition logic is reversed, causing the loop to continue indefinitely. If either situation sounds familiar, you are in the right place. I once wrote a backup script for a production […]
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The decision to use a bash for loop comes down to how much time you want to spend typing file names. If you've ever found yourself with 200 files all needing the same operation run on them, as I did during a log cleanup task, then using a for loop will save you hours of […]
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Writing a script to calculate disk usage percentages and send an email alert when a threshold is reached might sound straightforward at first. However, after writing half the script, trying something as simple as result=$a/$b can leave you staring at bash wondering what just happened. No error message. No useful output. Just silence. That exact […]
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Most programmers write their first Bash if statement using [ ] (or sometimes [[ ]]), run into a space-in-variable bug, spend an hour searching Google for a fix, and eventually hear about [[ ]] as some kind of magic solution without fully understanding how the two actually differ. I was one of those people. I […]
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You’ve got all of your variables defined, your script appears correct, and then when you run echo '$APP_DIR', the terminal spits back a dollar sign instead of the actual directory path. You are now sitting in front of the terminal wondering, “What just happened?” I wrote echo '$APP_DIR' using single quotes and could not understand […]
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11 Bash Variables and Default Values Made Easy | LinuxTeck Learning bash variables types explained with examples is the foundation every Linux scripter needs before writing anything serious. The first bash script I attempted to run produced an error that made absolutely no sense to me. It turned out I had written name = "LinuxTeck" […]
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Bash Decision Scripts Made Simple: 11 Real-World Examples | LinuxTeck While writing a Bash script with a simple sequential list of commands has some utility, this type of scripting is very limiting. A script truly comes into its own when it can make decisions automatically based on conditions or command results. Bash conditional statements allow […]
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Bash Case Statement with Examples — Shell Script Case Statements Made Simple | LinuxTeck You may be familiar with the challenge of having to use multiple if, elif, and else, blocks when checking for many different cases in one shell script. The bash case statement with examples provides a much simpler and easier-to-read method to […]
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Bash if Statement: Complete Guide with Examples | LinuxTeck If you have ever wanted your Linux scripts to make decisions on their own, you are in the right place. The bash if statement is a fundamental building block that allows shell scripts to test conditions and decide what action to take next. This bash if […]
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Bash if elif else Statement with Examples – LinuxTeck.com A basic Bash scripting need for making decisions about certain conditions is using the bash if elif else statement with examples. The conditional logic in scripts makes a static shell script into an active-thinking reactive automation of real server tasks. As either a new scripting user […]
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Backup and Remote Server Shell Scripts Made Simple | LinuxTeck Every SysAdmin has had at least some lost sleep because of a bad backup or missed scheduled (manual) tasks on a distant server. Writing a Linux Bash Script to backup files and directories automatically is probably one of the best things you can do for […]
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How to Write Interactive Shell Scripts in Linux | LinuxTeck Writing interactive shell scripts on Linux is a skill that can take simple automation and turn it into something truly valuable. Interactive shell scripting allows you to create scripts that can ask for user input, display menus, prompt for confirmation before performing dangerous actions, or […]
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Read User Input in Bash Made Simple | LinuxTeck The bash read command to get user input with examples is something every Linux user eventually needs to understand. If you want your shell script to interact with users by asking for their names, passwords, or even simple yes/no confirmations, then the read command will be […]
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Learn to Use echo in Shell Scripts the Right Way (2026) | LinuxTeck.com Most shell scripts will utilize the echo command within their scripts simply to display an entry of text and then move on. However this only utilizes a small percentage of what can be accomplished using echo. Once you understand how to properly […]
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Each and every command you execute in Linux will return a number called an exit status code, and it shows whether your Bash script has succeeded or failed. Mastering bash script exit codes and error handling is the difference between beginner scripts that silently crash and professional scripts that fail quickly, provide clear logging, and […]
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A bash script hello world example is the first thing every Linux beginner must write to understand how shell scripting works. Only a couple lines of code may be able to automate a process that would otherwise have to be done manually. Learning how to create a Bash Script Hello World Step By Step is […]
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